Dated: October 31st, 2022
REF: SUPERVISION REPORT FOR THE ON-GOING CONSTRUCTION WORK OF A COMMERCIAL
ON PLOT NO. 221.NTULELE TRADING CENTER-NAROK FOR PERIS WANJIKU
The following are the main substructure works activities recorded as at 31st October
-Blinding (PCC 1:4:8) of minimum 50mm to strip trenches and column bases was poured and
allowed to set
-Spacer blocks (selected hardcore) of minimum 2inches provided under all bases reinforcement
bars to allow for minimum cover
-placing in position of reinforcements cages to bases followed to respective pits while
maintaining square, supervised and approved ok.
-Placing and fixing in position of all axially and eccentric placed column reinforcements followed
while maintaining plumbline to all faces, supervised and approved ok.
-All Column reinforcement bars were fixed in position by tying with binding wire to base
reinforcement and braced by poles to restrain movement or tipping.
-All bases were well swept clean and water poured before pouring of concrete
-ratio preparation of cement: sand: barrast and water and mixing until a consistent, workable
mix was achieved. This was closely supervised and was approved
-Mixing was done by a drum mixer
-Vibrated reinforced concrete class 20 (1:2:4) to bases (400mm depth) was poured filled to strip
level, subsequently vibrated by poker vibrator and allowed to set, supervised and approved to
be ok.
Instructions for subsequent works
-Placing of strip reinforcement to all trenches of foundation carrying main load bearing walls to
follow
-all strip reinforcement to pass through the column reinforcements
-form work to strip foundation at cross point with column bases to control concrete spreading
all over the base.
-Spacer blocks of minimum 2inches to be provided under all reinforcement bars
-trenches to be swept clean and water poured before pouring of concrete.
-Vibrated reinforced concrete class 20 (1:2:4) to bases strip trenches (200mm depth) to follow
Placing of bases reinforcement in
position
Tying of column reinforcement in
position
Base reinforcement and spacer
blocks placement
fixing and bracing of column
reinforcement in position
A fixed column reinforcement ,well
braced and fixed to plumbline
Concreted base left to set
Pouring and vibrating concrete to
bases
Column stalks reinforcement
PREPARED BY____CLEMENT MWANGI__ (CONSTRUCTION SITE SUPERVISOR AND CLERK OF WORKS)
SIGN_____________
DATE_____28/10/2022________
APPROVED BY_______________________
SIGN_____________DATE_____________
(Client)
CC:
1.
2.
3.
4.
5.
6.
The National Construction Authority-Narok Liaison office
Narok county Building inspectorate
Architect-Samuel Mwangi (A1825)
Engineer-Sospeter Muiruri (A3480)
Qs Bernard Murimi (Q1049)
Jd Righteye Contractors Limited