If you go back to Exodus 26 you will find the instructions God gave Moses to build the tabernacle. There are measurements and materials for curtains, boards, sockets, coverings and so forth. In this chapter Bezaleel and Aholiab are following those instructions. The reading looks very similar but in this case they are doing all the things God described before.

Exodus 36

“Then Bezaleel and Aholiab, and every wise hearted man in whom the Lord put wisdom and understanding to know how to work all manner of work for the service of the sanctuary, shall do according to all that the LORD has commanded.”

2 And Moses called Bezaleel and Aholiab, and every wise hearted man in whose heart the LORD had put wisdom, even every one whose heart stirred him up to come unto the work to do it:

3 And they received from Moses all the offering, which the children of Israel had brought for the work of the service of the sanctuary, to make everything. And they brought to him freewill offerings every morning.

4 And all the craftsmen, who were doing the work of the sanctuary, came from the work they were doing.

5 They spoke to Moses, saying “The people bring much more than enough for the service of the work, which the LORD commanded to do.”

6 And Moses gave commandment, and they caused it to be proclaimed throughout the camp “Let neither man nor woman make anything else for the offering of the sanctuary.” So the people were restrained from bringing.

7 For the material they had was sufficient for all the work to be done, and more.

8 Every wise hearted man among them that did the work of the tabernacle made ten curtains of fine twined linen, and blue, and purple, and scarlet: with cherubims of cunning work they made them. 

9 The length of one curtain was twenty eight cubits, and the width of one curtain four cubits: the curtains were all of one size.

10 And he coupled the five curtains together: and the other five curtains he coupled together.

11 And he made loops of blue on the edge of the last curtain in the first set; and likewise with the first curtain of the second set. 

12 He made fifty loops in one curtain, and fifty loops in the edge of the curtain which was in the coupling of the second: the loops held one curtain to another.

13 And he made fifty clasps of gold, and coupled the curtains to one another with the clasps: so the tabernacle became one thing. 

14 He made curtains of goats’ hair for the tent over the tabernacle: He made eleven curtains. 

15 The length of one curtain was thirty cubits, and the width was four cubits: the eleven curtains were the same size.

16 He coupled five curtains by themselves, and six curtains by themselves.

17 And he made fifty loops on the edge of the outermost curtain, and fifty loops on the edge of the curtain which coupled the second.

18 He made fifty clasps of brass to couple the tent together, that it might be one.

19 He made a covering for the tent of rams’ skins dyed red, and a covering of badgers’ skins above that.

20 And he made boards for the tabernacle of acacia wood, standing upright. 

21 The length of a board was ten cubits, and the width of a board one and a half cubits.

22 One board had two tenons, equally distant one from another: he did the same for all the boards of the tabernacle.

23 And he made boards for the tabernacle; twenty boards for the south side southward:

24 And forty sockets of silver he made under the twenty boards; two sockets under one board for his two tenons, and two sockets under another board for his two tenons.

25 For the other side of the tabernacle, which is toward the north corner, he made twenty boards,

26 And their forty sockets of silver; two sockets under one board, and two sockets under another board.

27 For the sides of the tabernacle westward he made six boards.

28 And he made two boards for the corners of the tabernacle at the back.

29 And they were coupled beneath, and coupled together at the head, to one ring: he did this to both of them in both the corners.

30 There were eight boards; and sixteen sockets of silver, under every board two sockets.

31 And he made bars of acacia wood; five for the boards of the one side of the tabernacle,

32 And five bars for the boards of the other side of the tabernacle, and five bars for the boards of the tabernacle for the sides westward.

33 And he made the middle bar to shoot through the boards from one end to the other.

34 He overlaid the boards with gold, and made their rings of gold to be places for the bars, and overlaid the bars with gold.

35 He made a veil of blue, and purple, and scarlet, and fine twined linen: with cherubims he made it of skillful work.

36 And he made four pillars of acacia wood, and overlaid them with gold: their hooks were of gold; and he cast four sockets of silver for them. 

37 He made an embroidered hanging for the tabernacle door of blue, and purple, and scarlet, and fine twined linen.

38 And the five pillars of it with their hooks: and he overlaid the tops of the posts and their bands with gold: but their five sockets were bronze. 

See also: Exodus 36 ESV, HCSB, NASB, NIV